How to use newPromiseCapability method in wpt

Best JavaScript code snippet using wpt

es.promise.js

Source:es.promise.js

1import { DESCRIPTORS, GLOBAL, PROTO, STRICT } from '../helpers/constants';2import { createIterable } from '../helpers/helpers';3import { Promise, Symbol } from 'core-js-pure';4import getIteratorMethod from 'core-js-pure/features/get-iterator-method';5import { setPrototypeOf, create } from 'core-js-pure/features/object';6import bind from 'core-js-pure/features/function/bind';7QUnit.test('Promise', assert => {8  assert.isFunction(Promise);9  assert.throws(() => {10    Promise();11  }, 'throws w/o `new`');12  new Promise(function (resolve, reject) {13    assert.isFunction(resolve, 'resolver is function');14    assert.isFunction(reject, 'rejector is function');15    if (STRICT) assert.same(this, undefined, 'correct executor context');16  });17});18if (DESCRIPTORS) QUnit.test('Promise operations order', assert => {19  let resolve, resolve2;20  assert.expect(1);21  const EXPECTED_ORDER = 'DEHAFGBC';22  const async = assert.async();23  let result = '';24  const promise1 = new Promise(r => {25    resolve = r;26  });27  resolve({28    then() {29      result += 'A';30      throw Error();31    },32  });33  promise1.catch(() => {34    result += 'B';35  });36  promise1.catch(() => {37    result += 'C';38    assert.same(result, EXPECTED_ORDER);39    async();40  });41  const promise2 = new Promise(r => {42    resolve2 = r;43  });44  resolve2(Object.defineProperty({}, 'then', {45    get() {46      result += 'D';47      throw Error();48    },49  }));50  result += 'E';51  promise2.catch(() => {52    result += 'F';53  });54  promise2.catch(() => {55    result += 'G';56  });57  result += 'H';58  setTimeout(() => {59    if (!~result.indexOf('C')) {60      assert.same(result, EXPECTED_ORDER);61      async();62    }63  }, 1e3);64});65QUnit.test('Promise#then', assert => {66  assert.isFunction(Promise.prototype.then);67  assert.nonEnumerable(Promise.prototype, 'then');68  let promise = new Promise(resolve => {69    resolve(42);70  });71  let FakePromise1 = promise.constructor = function (executor) {72    executor(() => { /* empty */ }, () => { /* empty */ });73  };74  const FakePromise2 = FakePromise1[Symbol.species] = function (executor) {75    executor(() => { /* empty */ }, () => { /* empty */ });76  };77  assert.ok(promise.then(() => { /* empty */ }) instanceof FakePromise2, 'subclassing, @@species pattern');78  promise = new Promise(resolve => {79    resolve(42);80  });81  promise.constructor = FakePromise1 = function (executor) {82    executor(() => { /* empty */ }, () => { /* empty */ });83  };84  assert.ok(promise.then(() => { /* empty */ }) instanceof Promise, 'subclassing, incorrect `this` pattern');85  promise = new Promise(resolve => {86    resolve(42);87  });88  promise.constructor = FakePromise1 = function (executor) {89    executor(() => { /* empty */ }, () => { /* empty */ });90  };91  FakePromise1[Symbol.species] = function () { /* empty */ };92  assert.throws(() => {93    promise.then(() => { /* empty */ });94  }, 'NewPromiseCapability validations, #1');95  FakePromise1[Symbol.species] = function (executor) {96    executor(null, () => { /* empty */ });97  };98  assert.throws(() => {99    promise.then(() => { /* empty */ });100  }, 'NewPromiseCapability validations, #2');101  FakePromise1[Symbol.species] = function (executor) {102    executor(() => { /* empty */ }, null);103  };104  assert.throws(() => {105    promise.then(() => { /* empty */ });106  }, 'NewPromiseCapability validations, #3');107});108QUnit.test('Promise#catch', assert => {109  assert.isFunction(Promise.prototype.catch);110  assert.nonEnumerable(Promise.prototype, 'catch');111  let promise = new Promise(resolve => {112    resolve(42);113  });114  let FakePromise1 = promise.constructor = function (executor) {115    executor(() => { /* empty */ }, () => { /* empty */ });116  };117  const FakePromise2 = FakePromise1[Symbol.species] = function (executor) {118    executor(() => { /* empty */ }, () => { /* empty */ });119  };120  assert.ok(promise.catch(() => { /* empty */ }) instanceof FakePromise2, 'subclassing, @@species pattern');121  promise = new Promise(resolve => {122    resolve(42);123  });124  promise.constructor = FakePromise1 = function (executor) {125    executor(() => { /* empty */ }, () => { /* empty */ });126  };127  assert.ok(promise.catch(() => { /* empty */ }) instanceof Promise, 'subclassing, incorrect `this` pattern');128  promise = new Promise(resolve => {129    resolve(42);130  });131  promise.constructor = FakePromise1 = function (executor) {132    executor(() => { /* empty */ }, () => { /* empty */ });133  };134  FakePromise1[Symbol.species] = function () { /* empty */ };135  assert.throws(() => {136    promise.catch(() => { /* empty */ });137  }, 'NewPromiseCapability validations, #1');138  FakePromise1[Symbol.species] = function (executor) {139    executor(null, () => { /* empty */ });140  };141  assert.throws(() => {142    promise.catch(() => { /* empty */ });143  }, 'NewPromiseCapability validations, #2');144  FakePromise1[Symbol.species] = function (executor) {145    executor(() => { /* empty */ }, null);146  };147  assert.throws(() => {148    promise.catch(() => { /* empty */ });149  }, 'NewPromiseCapability validations, #3');150  assert.same(Promise.prototype.catch.call({151    then(x, y) {152      return y;153    },154  }, 42), 42, 'calling `.then`');155});156QUnit.test('Promise#@@toStringTag', assert => {157  assert.ok(Promise.prototype[Symbol.toStringTag] === 'Promise', 'Promise::@@toStringTag is `Promise`');158  assert.strictEqual(String(new Promise(() => { /* empty */ })), '[object Promise]', 'correct stringification');159});160QUnit.test('Promise.all', assert => {161  const { all, resolve } = Promise;162  assert.isFunction(all);163  assert.arity(all, 1);164  const iterable = createIterable([1, 2, 3]);165  Promise.all(iterable).catch(() => { /* empty */ });166  assert.ok(iterable.received, 'works with iterables: iterator received');167  assert.ok(iterable.called, 'works with iterables: next called');168  const array = [];169  let done = false;170  array['@@iterator'] = undefined;171  array[Symbol.iterator] = function () {172    done = true;173    return getIteratorMethod([]).call(this);174  };175  Promise.all(array);176  assert.ok(done);177  assert.throws(() => {178    all.call(null, []).catch(() => { /* empty */ });179  }, TypeError, 'throws without context');180  done = false;181  try {182    Promise.resolve = function () {183      throw new Error();184    };185    Promise.all(createIterable([1, 2, 3], {186      return() {187        done = true;188      },189    })).catch(() => { /* empty */ });190  } catch (error) { /* empty */ }191  Promise.resolve = resolve;192  assert.ok(done, 'iteration closing');193  let FakePromise1 = function (executor) {194    executor(() => { /* empty */ }, () => { /* empty */ });195  };196  let FakePromise2 = FakePromise1[Symbol.species] = function (executor) {197    executor(() => { /* empty */ }, () => { /* empty */ });198  };199  FakePromise1.resolve = FakePromise2.resolve = bind(resolve, Promise);200  assert.ok(all.call(FakePromise1, [1, 2, 3]) instanceof FakePromise1, 'subclassing, `this` pattern');201  FakePromise1 = function () { /* empty */ };202  FakePromise2 = function (executor) {203    executor(null, () => { /* empty */ });204  };205  const FakePromise3 = function (executor) {206    executor(() => { /* empty */ }, null);207  };208  FakePromise1.resolve = FakePromise2.resolve = FakePromise3.resolve = bind(resolve, Promise);209  assert.throws(() => {210    all.call(FakePromise1, [1, 2, 3]);211  }, 'NewPromiseCapability validations, #1');212  assert.throws(() => {213    all.call(FakePromise2, [1, 2, 3]);214  }, 'NewPromiseCapability validations, #2');215  assert.throws(() => {216    all.call(FakePromise3, [1, 2, 3]);217  }, 'NewPromiseCapability validations, #3');218});219QUnit.test('Promise.race', assert => {220  const { race, resolve } = Promise;221  assert.isFunction(race);222  assert.arity(race, 1);223  const iterable = createIterable([1, 2, 3]);224  Promise.race(iterable).catch(() => { /* empty */ });225  assert.ok(iterable.received, 'works with iterables: iterator received');226  assert.ok(iterable.called, 'works with iterables: next called');227  const array = [];228  let done = false;229  array['@@iterator'] = undefined;230  array[Symbol.iterator] = function () {231    done = true;232    return getIteratorMethod([]).call(this);233  };234  Promise.race(array);235  assert.ok(done);236  assert.throws(() => {237    race.call(null, []).catch(() => { /* empty */ });238  }, TypeError, 'throws without context');239  done = false;240  try {241    Promise.resolve = function () {242      throw new Error();243    };244    Promise.race(createIterable([1, 2, 3], {245      return() {246        done = true;247      },248    })).catch(() => { /* empty */ });249  } catch (error) { /* empty */ }250  Promise.resolve = resolve;251  assert.ok(done, 'iteration closing');252  let FakePromise1 = function (executor) {253    executor(() => { /* empty */ }, () => { /* empty */ });254  };255  let FakePromise2 = FakePromise1[Symbol.species] = function (executor) {256    executor(() => { /* empty */ }, () => { /* empty */ });257  };258  FakePromise1.resolve = FakePromise2.resolve = bind(resolve, Promise);259  assert.ok(race.call(FakePromise1, [1, 2, 3]) instanceof FakePromise1, 'subclassing, `this` pattern');260  FakePromise1 = function () { /* empty */ };261  FakePromise2 = function (executor) {262    executor(null, () => { /* empty */ });263  };264  const FakePromise3 = function (executor) {265    executor(() => { /* empty */ }, null);266  };267  FakePromise1.resolve = FakePromise2.resolve = FakePromise3.resolve = bind(resolve, Promise);268  assert.throws(() => {269    race.call(FakePromise1, [1, 2, 3]);270  }, 'NewPromiseCapability validations, #1');271  assert.throws(() => {272    race.call(FakePromise2, [1, 2, 3]);273  }, 'NewPromiseCapability validations, #2');274  assert.throws(() => {275    race.call(FakePromise3, [1, 2, 3]);276  }, 'NewPromiseCapability validations, #3');277});278QUnit.test('Promise.resolve', assert => {279  const { resolve } = Promise;280  assert.isFunction(resolve);281  assert.throws(() => {282    resolve.call(null, 1).catch(() => { /* empty */ });283  }, TypeError, 'throws without context');284  function FakePromise1(executor) {285    executor(() => { /* empty */ }, () => { /* empty */ });286  }287  FakePromise1[Symbol.species] = function (executor) {288    executor(() => { /* empty */ }, () => { /* empty */ });289  };290  assert.ok(resolve.call(FakePromise1, 42) instanceof FakePromise1, 'subclassing, `this` pattern');291  assert.throws(() => {292    resolve.call(() => { /* empty */ }, 42);293  }, 'NewPromiseCapability validations, #1');294  assert.throws(() => {295    resolve.call(executor => {296      executor(null, () => { /* empty */ });297    }, 42);298  }, 'NewPromiseCapability validations, #2');299  assert.throws(() => {300    resolve.call(executor => {301      executor(() => { /* empty */ }, null);302    }, 42);303  }, 'NewPromiseCapability validations, #3');304});305QUnit.test('Promise.reject', assert => {306  const { reject } = Promise;307  assert.isFunction(reject);308  assert.throws(() => {309    reject.call(null, 1).catch(() => { /* empty */ });310  }, TypeError, 'throws without context');311  function FakePromise1(executor) {312    executor(() => { /* empty */ }, () => { /* empty */ });313  }314  FakePromise1[Symbol.species] = function (executor) {315    executor(() => { /* empty */ }, () => { /* empty */ });316  };317  assert.ok(reject.call(FakePromise1, 42) instanceof FakePromise1, 'subclassing, `this` pattern');318  assert.throws(() => {319    reject.call(() => { /* empty */ }, 42);320  }, 'NewPromiseCapability validations, #1');321  assert.throws(() => {322    reject.call(executor => {323      executor(null, () => { /* empty */ });324    }, 42);325  }, 'NewPromiseCapability validations, #2');326  assert.throws(() => {327    reject.call(executor => {328      executor(() => { /* empty */ }, null);329    }, 42);330  }, 'NewPromiseCapability validations, #3');331});332if (PROTO) QUnit.test('Promise subclassing', assert => {333  function SubPromise(executor) {334    const self = new Promise(executor);335    setPrototypeOf(self, SubPromise.prototype);336    self.mine = 'subclass';337    return self;338  }339  setPrototypeOf(SubPromise, Promise);340  SubPromise.prototype = create(Promise.prototype);341  SubPromise.prototype.constructor = SubPromise;342  let promise1 = SubPromise.resolve(5);343  assert.strictEqual(promise1.mine, 'subclass');344  promise1 = promise1.then(it => {345    assert.strictEqual(it, 5);346  });347  assert.strictEqual(promise1.mine, 'subclass');348  let promise2 = new SubPromise(resolve => {349    resolve(6);350  });351  assert.strictEqual(promise2.mine, 'subclass');352  promise2 = promise2.then(it => {353    assert.strictEqual(it, 6);354  });355  assert.strictEqual(promise2.mine, 'subclass');356  const promise3 = SubPromise.all([promise1, promise2]);357  assert.strictEqual(promise3.mine, 'subclass');358  assert.ok(promise3 instanceof Promise);359  assert.ok(promise3 instanceof SubPromise);360  promise3.then(assert.async(), error => {361    assert.ok(false, error);362  });363});364// qunit@2.5 strange bug365QUnit.skip('Unhandled rejection tracking', assert => {366  let done = false;367  const resume = assert.async();368  if (GLOBAL.process) {369    assert.expect(3);370    function onunhandledrejection(reason, promise) {371      process.removeListener('unhandledRejection', onunhandledrejection);372      assert.same(promise, $promise, 'unhandledRejection, promise');373      assert.same(reason, 42, 'unhandledRejection, reason');374      $promise.catch(() => {375        // empty376      });377    }378    function onrejectionhandled(promise) {379      process.removeListener('rejectionHandled', onrejectionhandled);380      assert.same(promise, $promise, 'rejectionHandled, promise');381      done || resume();382      done = true;383    }384    process.on('unhandledRejection', onunhandledrejection);385    process.on('rejectionHandled', onrejectionhandled);386  } else {387    if (GLOBAL.addEventListener) {388      assert.expect(8);389      function onunhandledrejection(it) {390        assert.same(it.promise, $promise, 'addEventListener(unhandledrejection), promise');391        assert.same(it.reason, 42, 'addEventListener(unhandledrejection), reason');392        GLOBAL.removeEventListener('unhandledrejection', onunhandledrejection);393      }394      GLOBAL.addEventListener('rejectionhandled', onunhandledrejection);395      function onrejectionhandled(it) {396        assert.same(it.promise, $promise, 'addEventListener(rejectionhandled), promise');397        assert.same(it.reason, 42, 'addEventListener(rejectionhandled), reason');398        GLOBAL.removeEventListener('rejectionhandled', onrejectionhandled);399      }400      GLOBAL.addEventListener('rejectionhandled', onrejectionhandled);401    } else assert.expect(4);402    GLOBAL.onunhandledrejection = function (it) {403      assert.same(it.promise, $promise, 'onunhandledrejection, promise');404      assert.same(it.reason, 42, 'onunhandledrejection, reason');405      setTimeout(() => {406        $promise.catch(() => {407          // empty408        });409      }, 1);410      GLOBAL.onunhandledrejection = null;411    };412    GLOBAL.onrejectionhandled = function (it) {413      assert.same(it.promise, $promise, 'onrejectionhandled, promise');414      assert.same(it.reason, 42, 'onrejectionhandled, reason');415      GLOBAL.onrejectionhandled = null;416      done || resume();417      done = true;418    };419  }420  Promise.reject(43).catch(() => {421    // empty422  });423  const $promise = Promise.reject(42);424  setTimeout(() => {425    done || resume();426    done = true;427  }, 3e3);...

Using AI Code Generation

1var newPromiseCapability = function (C) {2    var resolve, reject;3    var promise = new C(function ($$resolve, $$reject) {4        if (resolve !== undefined || reject !== undefined)5            throw TypeError('Bad Promise constructor');6        resolve = $$resolve;7        reject = $$reject;8    });9    if (resolve === undefined || reject === undefined)10        throw TypeError('Bad Promise constructor');11    return { promise: promise, resolve: resolve, reject: reject };12};13var p = newPromiseCapability(Promise);14p.resolve(42);15p.promise.then(function (v) {16    $DONE('This promise should not be fulfilled: ' + v);17}, function (e) {18    $DONE('This promise should not be rejected: ' + e);19});

Using AI Code Generation

1var newPromiseCapability = function (C) {2    if (typeof C !== 'function') {3        throw new TypeError('Bad promise constructor');4    }5    var capability = {6    };7    var executor = function (resolve, reject) {8        if (capability.resolve !== undefined || capability.reject !== undefined) {9            throw new TypeError('Bad Promise implementation!');10        }11        capability.resolve = resolve;12        capability.reject = reject;13    };14    try {15        var promise = new C(executor);16        if (Object(promise) !== promise) {17            throw new TypeError('Bad promise constructor');18        }19        capability.promise = promise;20    } catch (e) {21        capability.reject(e);22    }23    return capability;24};25var p = newPromiseCapability(Promise);26p.resolve(42);27p.promise.then(function (v) {28});

Using AI Code Generation

1var newPromiseCapability = require('wpt').newPromiseCapability;2var promiseCapability = newPromiseCapability(Promise);3promiseCapability.promise.then(function(value) {4  console.log(value);5});6promiseCapability.resolve('foo');

Using AI Code Generation

1var test = require('wpt').test;2var newPromiseCapability = require('wpt').newPromiseCapability;3var p = newPromiseCapability(test.Promise);4p.promise.then(function (x) {5    test.step(function () {6        test.assert_equals(x, 42, 'Promise fulfilled with 42');7    });8    test.done();9});10p.resolve(42);

Using AI Code Generation

1const wpt = require('webpagetest');2const wptTest = wpt('A.345f4a6a7f0f3d2b0a1d3e6a0f6c2f6e');3}, (err, data) => {4    if (err) {5        console.log(err);6    }7    console.log(data);8});9const wpt = require('webpagetest');10const wptTest = wpt('A.345f4a6a7f0f3d2b0a1d3e6a0f6c2f6e');11}, (err, data) => {12    if (err) {13        console.log(err);14    }15    console.log(data);16});17const wpt = require('webpagetest');18const wptTest = wpt('A.345f4a6a7f0f3d2b0a1d3e6a0f6c2f6e');19}, (err, data) => {20    if (err) {21        console.log(err);22    }23    console.log(data);24});

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.